Answer / visakh

input voltage is 24vdc
output is 4-20mA

Answer / bhaumik

In the 2-wire transmitter 24VDC power is given. The +ve of
the 24V is connect to +ve of the transmitter, -Ve of the
transmitter is connect to +ve of the Indicator & -ve of the
indictor is connect to -ve of the 24Vdc powersupply.

Answer / manoj kumar

A two wire transmitter is connected directly to the wires
coming from DCS/PLC with (+)ve to the (+)ve terminal of the
transmitter and (-)ve to the (-)ve terminal of the
transmitter.

Answer / touch2gobi

In 2 Wire system, we have only two terminals

1 - +24 Vdc

2 - Output signal (4 - 20mA)

No Need ground signal etc....

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

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